Comparison of the difference between optical fiber terminal box and optical fiber distribution frame

Comparison of the difference between optical fiber terminal box and optical fiber distribution frame

Comparison of the difference between optical fiber terminal box and optical fiber distribution frame

Optical fiber terminal box:

The optical fiber terminal box is the terminal connector of an optical cable. One end is an optical cable and the other end is a pigtail. It is equivalent to a device that splits an optical cable into a single optical fiber. The fusion splicing of optical fiber and optical fiber, the fusion splicing of optical fiber and pigtail, and the handover of optical connector. It also provides mechanical protection and environmental protection for the optical fiber and its components, and allows proper inspections to maintain the highest standards of optical fiber management.

Basic function

The optical fiber terminal box as the terminal equipment of the optical cable line should have 4 basic functions

1 Fixing function After the optical cable enters the rack, its outer sheath and reinforcing core shall be mechanically fixed, ground wire protection parts shall be installed, end protection treatment shall be carried out, and the optical fibers shall be grouped and protected.

2 Containment function After the optical fiber drawn from the optical cable is fused with the pigtail cable, the excess optical fiber is coiled and stored, and the fusion splice is protected.

3 With the deployment function, the connector attached to the tail cable is plugged into the adapter, and the optical connector is connected to the optical connector on the other side of the adapter. Adapters and connectors should be able to be flexibly plugged and unplugged: the optical path can be freely deployed and tested.

4 Storage function Provides storage for various cross-connected optical cables between racks, enabling them to be placed in a regular and orderly manner. There should be an appropriate space and method in the fiber terminal box to make this part of the optical connection line clear, easy to adjust, and meet the minimum bending radius requirements. With the development of optical fiber networks, the existing functions of optical fiber terminal boxes can no longer meet many new requirements. Some manufacturers directly add some optical fiber network components such as optical splitters, wavelength division multiplexers and optical switches to the optical fiber terminal boxes.

ODF (Optical Distribution Frame) optical fiber distribution frame:

The optical fiber distribution frame (ODF) is used for the termination and distribution of the backbone optical cable of the central office in the optical fiber communication system, which can easily realize the connection, distribution and dispatch of optical fiber lines. With the increasing degree of network integration, there has been an optical-digital hybrid distribution frame integrating ODF, DDF, and power distribution units, which is suitable for small and medium-sized distribution frames of fiber to the cell, fiber to the building, remote module and wireless base station.线系统。 Line system. Functional requirements

Optical cable fixed protection

It shall have optical edge introduction, fixation and protection device, which shall introduce and fix the optical fiber continuously on the rack to protect the optical cable and the core of the cable from damage. The metal part of the optical cable is insulated from the metal frame, and the fixed optical winding metal sheath and reinforced core should be reliably connected to the high-voltage protective grounding device.

Optical fiber termination function

It shall have an optical fiber termination device, which is convenient for the operation, construction, installation and maintenance of the optical fiber core and pigtail splicing, can fix and protect the joint part straight without displacement, avoid the influence of external force, and ensure the coiled optical fiber core and pigtail Not damaged.

Thread adjustment function

Through the optical fiber jumper connector plug, it can quickly and conveniently schedule the core number in the optical cable and change the path sequence of the optical transmission system.

Optical fiber core protection

After the fiber optic cable is stripped, there is a protection device for the core, and a termination device for the introduction of the fiber after being fixed.

Capacity

The capacity of each rack and unit capacity (determined by the number of adapters) should be specified in the product enterprise standard, and the optical fiber termination device, optical fiber storage device, and optical fiber connection distribution device should be able to be configured as a complete set within the full capacity range.

Logo record function

The rack and unit should have a complete identification and recording device to easily identify the core serial number or transmission path sequence, and the recording device should be easy to modify and replace.

Optical storage function

There should be enough space in the rack and unit to store the remaining optical fiber.

The difference between optical fiber terminal box and optical fiber distribution frame:

The number of interfaces is different, and the places used are different.

The optical fiber distribution frame is used to connect the vertical backbone and the horizontal optical cable. It is generally a 19-inch rack with a height of 1U, and usually has at least 12 ports. The optical fiber terminal box is usually placed at the end of the horizontal optical cable, that is, from the optical fiber. The device connected to the optical jumper through the coupler in the terminal box is the nearest plug-in point to the terminal (switching device or PC), usually up to 8 ports, all of which are desktop.

The two can be used interchangeably if they are not very real. The real role played is a bracket of the coupler, and they themselves do not participate in data transmission.